diff --git a/bench/arty_multi.py b/bench/arty_multi.py new file mode 100755 index 0000000..f887f74 --- /dev/null +++ b/bench/arty_multi.py @@ -0,0 +1,253 @@ +#!/usr/bin/env python3 + +# +# This file is part of LiteEth. +# +# Copyright (c) 2020 Florent Kermarrec +# Copyright (c) 2022 Charles-Henri Mousset +# SPDX-License-Identifier: BSD-2-Clause + +import os +import argparse + +from migen import * + +from litex_boards.platforms import digilent_arty +from litex.build.xilinx.vivado import vivado_build_args, vivado_build_argdict +from litex_boards.targets.digilent_arty import _CRG, BaseSoC +from litex.build.generic_platform import * + +from litex.soc.cores.clock import * +from litex.soc.interconnect.csr import * +from litex.soc.integration.soc_core import * +from litex.soc.integration.builder import * + +from liteeth.phy.mii import LiteEthPHYMII +from liteeth.phy.ethernet import LiteEthPHYETHERNET + +from litescope import LiteScopeAnalyzer + + +# PMOD Raw 10BASET Ethernet ------------------------------------------------------------------------ +# +# This testbench uses 2 differential pairs of the Arty-A7, and 4 outputs to bias the termination +# resistors. +# Two(2) 100 Ohms resistor (termination), four(4) 1kOhms (bias) resistors and four(4) capacitors are +# required to connect to the Ethernet port. +# Both the TX and RX pairs are wired identically. +# Using the 4 IOs as pullup/down are not strictly required (you can bias to GND/3V3 instead), but it +# makes wiring very convenient using only a piece of proto-PCB and SMD components. +# +# Ideally the capacitors should be replaced with suitable transformers, but for short +# wiring the capacitors usually work well. +# +# +───────PMOD Pinout───────+ +# | 7 td_p_pd | td_p 1 | +# | 8 td_n_pu | td_n 2 | +# | 9 rd_p_pd | rd_p 3 | +# | 10 rd_n_pu | rd_n 4 | +# | 11 GND | GND 5 | +# | 12 3V3 | 3V3 6 | +# +────────────+────────────+ +# +# ___ +# td_p_pd──|___|───td_p────||────ORANGE/WHITE (RJ45 3) +# 1k0 | 1u +# ─ +# | | 100 +# ─ +# ___ | +# td_n_pu──|___|───td_n────||────ORANGE (RJ45 6) +# 1k0 1u +# +# +# ___ +# rd_p_pd──|___|───rd_p────||────GREEN/WHITE (RJ45 1) +# 1k0 | 1u +# ─ +# | | 100 +# ─ +# ___ | +# rd_n_pu──|___|───rd_n────||────GREEN (RJ45 2) +# 1k0 1u +# +# +# Alternate wiring using a transformer (both channels are identical): +# ___ +# rd_p_pd──|___|───rd_p─────, ,────GREEN/WHITE (RJ45 1) +# 1k0 | *_) || (_* +# ─ _) || (_ +# | | 100 _) || (_ +# ─ _) || (_ +# ___ | _) || (_ +# rd_n_pu──|___|───rd_n─────' '────GREEN (RJ45 2) +# 1k0 +# + +raw_eth = [ + ("raw_eth", 0, + Subsignal("td_p", Pins("pmodb:0"), IOStandard("LVCMOS33")), + Subsignal("td_n", Pins("pmodb:1"), IOStandard("LVCMOS33")), + Subsignal("rd_p", Pins("pmodb:2"), IOStandard("LVDS_25"), Misc("PULLDOWN")), + Subsignal("rd_n", Pins("pmodb:3"), IOStandard("LVDS_25"), Misc("PULLUP")), + Subsignal("td_p_pd", Pins("pmodb:4"), IOStandard("LVCMOS33")), + Subsignal("td_n_pu", Pins("pmodb:5"), IOStandard("LVCMOS33")), + Subsignal("rd_p_pd", Pins("pmodb:6"), IOStandard("LVCMOS33")), + Subsignal("rd_n_pu", Pins("pmodb:7"), IOStandard("LVCMOS33")), + ), +] + + +# Bench SoC ---------------------------------------------------------------------------------------- +class BenchSoC(BaseSoC): + def __init__(self, sys_clk_freq=int(50e6), with_raw_ethernet=True, **kwarg): + analyzer_signals = [] + + # BaseSoC ---------------------------------------------------------------------------------- + super().__init__(**kwarg + ) + self.platform.add_extension(raw_eth) + + # Etherbone on 'raw' ethernet -------------------------------------------------------------- + if with_raw_ethernet: + eth_raw_pads = self.platform.request("raw_eth") + self.crg.clock_domains.cd_eth_raw = ClockDomain() + self.crg.clock_domains.cd_eth_raw_tx = ClockDomain() + self.crg.clock_domains.cd_eth_raw_rx = ClockDomain() + self.comb += [ + self.crg.cd_eth_raw_rx.clk.eq(self.crg.cd_eth_raw.clk), + self.crg.cd_eth_raw_tx.clk.eq(self.crg.cd_eth_raw.clk), + ] + self.crg.pll.create_clkout(self.crg.cd_eth_raw, 40e6) + self.submodules.ethphy = ethphy = LiteEthPHYETHERNET( + pads = eth_raw_pads, refclk_cd="eth_raw", + with_hw_init_reset = False) + self.add_etherbone(name="etherbone", phy=self.ethphy, buffer_depth=255, + ip_address="192.168.2.51", phy_cd="eth_raw") + analyzer_signals += [ + ethphy.rx.fsm, + ethphy.tx.fsm, + ethphy.rx.rx_i, + ethphy.tx.tx, + ] + self.comb += [ + eth_raw_pads.td_p_pd.eq(0), + eth_raw_pads.td_n_pu.eq(1), + eth_raw_pads.rd_p_pd.eq(0), + eth_raw_pads.rd_n_pu.eq(1), + ] + + # Analyzer --------------------------------------------------------------------------------- + ethcore = self.ethcore_etherbone + etherbone = self.etherbone + self.submodules.analyzer = LiteScopeAnalyzer(analyzer_signals + [ + self.ethphy.sink, + self.ethphy.source, + # MAC. + ethcore.mac.core.sink.valid, + ethcore.mac.core.sink.ready, + ethcore.mac.core.source.valid, + ethcore.mac.core.source.payload, + ethcore.mac.core.source.ready, + + # ARP. + ethcore.arp.rx.sink.valid, + ethcore.arp.rx.sink.ready, + ethcore.arp.tx.source.valid, + ethcore.arp.tx.source.ready, + + # IP. + ethcore.ip.rx.sink.valid, + ethcore.ip.rx.sink.ready, + ethcore.ip.tx.source.valid, + ethcore.ip.tx.source.ready, + + # UDP. + ethcore.udp.rx.sink.valid, + ethcore.udp.rx.sink.ready, + ethcore.udp.tx.source.valid, + ethcore.udp.tx.source.ready, + + # Etherbone. + etherbone.packet.rx.sink.valid, + etherbone.packet.rx.sink.ready, + etherbone.packet.rx.fsm, + etherbone.packet.tx.source.valid, + etherbone.packet.tx.source.ready, + etherbone.packet.tx.fsm, + etherbone.record.receiver.fsm, + etherbone.record.sender.fsm + ], + depth=1024 * 8, trigger_depth=256) + + +# Main --------------------------------------------------------------------------------------------- + +def main(): + from litex.soc.integration.soc import LiteXSoCArgumentParser + parser = LiteXSoCArgumentParser(description="LiteX SoC on Arty A7") + target_group = parser.add_argument_group(title="Target options") + target_group.add_argument("--toolchain", default="vivado", help="FPGA toolchain (vivado, symbiflow or yosys+nextpnr).") + target_group.add_argument("--build", action="store_true", help="Build design.") + target_group.add_argument("--load", action="store_true", help="Load bitstream.") + target_group.add_argument("--flash", action="store_true", help="Flash bitstream.") + target_group.add_argument("--variant", default="a7-35", help="Board variant (a7-35 or a7-100).") + target_group.add_argument("--sys-clk-freq", default=100e6, help="System clock frequency.") + ethopts = target_group.add_mutually_exclusive_group() + ethopts.add_argument("--with-ethernet", action="store_true", help="Enable Ethernet support.") + ethopts.add_argument("--with-etherbone", action="store_true", help="Enable Etherbone support.") + ethopts.add_argument("--raw-eth", action="store_true", help="use raw 10BASET ethernet on PMODA") + target_group.add_argument("--eth-ip", default="192.168.1.50", type=str, help="Ethernet/Etherbone IP address.") + target_group.add_argument("--eth-dynamic-ip", action="store_true", help="Enable dynamic Ethernet IP addresses setting.") + sdopts = target_group.add_mutually_exclusive_group() + sdopts.add_argument("--with-spi-sdcard", action="store_true", help="Enable SPI-mode SDCard support.") + sdopts.add_argument("--with-sdcard", action="store_true", help="Enable SDCard support.") + target_group.add_argument("--sdcard-adapter", type=str, help="SDCard PMOD adapter (digilent or numato).") + target_group.add_argument("--with-jtagbone", action="store_true", help="Enable JTAGbone support.") + target_group.add_argument("--with-spi-flash", action="store_true", help="Enable SPI Flash (MMAPed).") + target_group.add_argument("--with-pmod-gpio", action="store_true", help="Enable GPIOs through PMOD.") # FIXME: Temporary test. + builder_args(parser) + soc_core_args(parser) + vivado_build_args(parser) + args = parser.parse_args() + + assert not (args.with_etherbone and args.eth_dynamic_ip) + + soc = BenchSoC( + variant = args.variant, + toolchain = args.toolchain, + sys_clk_freq = int(float(args.sys_clk_freq)), + with_ethernet = args.with_ethernet, + with_etherbone = args.with_etherbone, + eth_ip = args.eth_ip, + eth_dynamic_ip = args.eth_dynamic_ip, + with_jtagbone = args.with_jtagbone, + with_spi_flash = args.with_spi_flash, + with_pmod_gpio = args.with_pmod_gpio, + with_raw_ethernet = args.raw_eth, + **soc_core_argdict(args) + ) + if args.sdcard_adapter == "numato": + soc.platform.add_extension(digilent_arty._numato_sdcard_pmod_io) + else: + soc.platform.add_extension(digilent_arty._sdcard_pmod_io) + if args.with_spi_sdcard: + soc.add_spi_sdcard() + if args.with_sdcard: + soc.add_sdcard() + + builder = Builder(soc, **builder_argdict(args)) + builder_kwargs = vivado_build_argdict(args) if args.toolchain == "vivado" else {} + if args.build: + builder.build(**builder_kwargs) + + if args.load: + prog = soc.platform.create_programmer() + prog.load_bitstream(builder.get_bitstream_filename(mode="sram")) + + if args.flash: + prog = soc.platform.create_programmer() + prog.flash(0, builder.get_bitstream_filename(mode="flash")) + +if __name__ == "__main__": + main()